Page 1 of 4
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 2)*
Name of Issuer: UNIT INSTRUMENTS, INC.
COMMON STOCK
CUSIP Number: 909210100
*The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class
of securities, and for any subsequent amendment containing information
which would alter the disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the
Securities Exchange Act of 1934 ("Act") or otherwise subject to the
liabilities of that section of the Act but shall be subject to all
other provisions of the Act (however, see the Notes)
CUSIP NO. 909210100 13G
Page 2 of 4
1. NAME OF REPORTING PERSON
S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
The Killen Group, Inc.
IRS #23-2213851
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
(a) o
(b) o
3. SEC USE ONLY
4. CITIZENSHIP OR PLACE OF ORGANIZATION
Incorporated in the Commonwealth of Pennsylvania
NUMBER OF 5. SOLE VOTING POWER:
261,993
SHARES
BENEFICIALLY 6. SHARE VOTING POWER:
OWNED BY
EACH 7. SOLE DISPOSITIVE POWER:
534,300
REPORTING
PERSON 8. SHARED DISPOSITIVE POWER:
WITH
9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
534,300
10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES*
11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
12.2%
12. TYPE OF REPORTING PERSON*
IA
CUSIP NO. 909210100 13G
Page 3 of 4
Item 1.
(a) The Issuer is Unit Instruments, Inc.
(b) The Issuer's principal offices are located at 22600 Savi Ranch
Parkway, Yorba Linda, CA 92887
Item 2.
The Killen Group, Inc.
(a) The Killen Group, Inc. is a person filing this report.
(b) The Killen Group's address is 1199 Lancaster Avenue, Berwyn, Pa
19312.
(c) The Killen Group is a corporation incorporated under the laws
of the Commonwealth of
Pennsylvania.
(d) This filing pertains to the common stock of the Issuer.
(e) The CUSIP number for the common stock is 909210100.
Item 3.
The Killen group, Inc. is an Investment Adviser registered under
section 203 of the Investment Adviser Act of 1940.
Item 4.
The Killen Group
(a) The Killen Group is the beneficial owner of 534,300 shares of
the Issuer's common stock.
(b) The amount owned by The Killen Group is 12.2% of the shares
outstanding.
(c) (i) The Killen Group has the sole power to vote or to direct
the vote of 261,993 shares of
common stock.
(iii) The Killen Group has the sole power to dispose or to
direct the disposition of 534,300 shares of
common stock.
Item 5.
Not applicable.
Item 6.
Other persons who have the right to receive dividends and the
right to the proceeds of a sale of the
securities are the clients of The Killen Group, for whom the
securities were purchased.
Item 7.
Not applicable.
Item 8.
Not applicable.
Item 9.
Not applicable.
CUSIP NO. 909210100 13G
Page 4 of 4
Item 10.
By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above, were acquired in the
ordinary course of business and were not acquired for the purpose of
and do not have the effect of changing or influencing the control of
the issuer or such securities and were not acquired in connection with
or as a participant in any transaction having such purposes or effect.
After reasonable inquiry and to the best of my knowledge and
belief, I certify that the information set forth in this statement is
true, complete and correct.
Date: February
17, 1998
The Killen Group,
Inc.
Eedward A.
Killen
Signature
Edward A. Killen,
Executive Vice President
Name/Title
